Write the electronic configuration of the element in which the element holds orbitals having the same energies even for different azimuthal quantum number?

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Kr (Z=36)e.c is 1s2 ,2s2 ,2p6 ,3s2 ,3p6 ,4s2 ,3d10,4p6

2p6 orbital has same energy as3s2 , &3d10 orbital has same energy as 4p6 etc.  

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